Products

Segment Screw Element

Segment Screw Element

Screw elements are the basic need of various machineries and
industries for various purpose. They are available in a variety of shapes,
sizes, designs and with a variety of specifications. Not to mention screw
combination of twin screw extruder for plastic mixing modification, screw shaft
together with screw elements.

Omega Barrel Screw brings you a new range of highly advanced screw element that come with nano-structured ceramic coatings that are used on
the surface of screw elements to get high wear resistance and corrosion
resistance. We offer these barrels and screw elements that are coated with this
advanced material to ensure their durability and safety.

Omega Machinery has been providing you the different level
of combined screw elements that are in the different diameter. Some of these
screws are in a variety of combinations like side face, bottom face and a lot
more.

Our main motive is to bring you something different and
advanced; while you can place your order from anywhere anytime. Main motive of
professionals who are working here is to bring you something advanced and
innovative. You can place your order from anywhere in the world according to
your choice and get them delivered to your given address.

Our team of multilingual professionals have years of
experience who take the responsibility of all documentation and delivery to
your address.

So, what you are waiting for, please
go through our collection of advanced screws and barrels and place your order
accordingly.

Varieties of material can be chosen based on customer's working condition, steel supplier is reliable

Generally made of nitrided steel, mold steel and different kinds of high-speed steel,steel supplier is uneven

Finished Product Hardness

Hardness Control:HRC58～62

Hardness is not stable because of the quality of materials

Internal spline of a single longer screw element

Spline through full length that element strength is high

there is no spline on the middle of element that strenth is low

Size Tolerance

Deviation

Size tolerances of spline ID

≤0.04mm

≤0.20mm

Size tolerances of OD

≤0.025mm

≤0.05mm

Size tolerances of thread ID

≤0.04mm

≤0.10mm

Shape Tolerance Deviation

End surface perpendicular to the axis of

≤0.02mm

≤0.08mm

Coaxiality of internal spline with thread OD

≤0.03mm

≤0.10mm

Main Machining Equipment

Internal Spline Processing Equipment

Horizontal Broaching Machine

Horizontal Broaching Machine

Screw Thread Processing Equipment

CNC Thread Grinding Machine

General Lathe Restructuring

1) The data above based on supplied report by some OEM companies and end user all over the world specialize in making Co-rotating Twin-screw Extruder.

2) More material can be chosen for element manufacturing, such as high-vanadium powder steel WR5 from Finland, the theoretical operation life of which is more than twice times of high speed steel, and other varied of bimetallic steel bar...

Any more higher quality inquiry, welcome to discuss, and it is certain that it could be made according to customer”s drawing after analysis.

1.One-side gap between screw and barrel is an important factor which effect both properties of products and extruder degree ;

2.Meshing gap between two screws is a significant factor that not only effects materials remaining time inside the barrel and the dispersity & distribution of compounding materials, but also effects the extruder capacity ;

3.In terms of meshing gap between two screws, if same material M2 and same declared useless state, adopting DegreeⅠabove would extend the working life greatly. For instance, elements in plastifying zone would be extended for 3000 hours, elements in disperse zone for material compounding, such as the glass fiber would be extended for 2000 hours, elements in conveying zone would be extended for10000 hours;

Hastelloy C-276 is one kind of Nickel-Chromium-Molybdenum alloy and with Wolfram, its silicon and carbon contents is less. It has a better corrosion resistance feature when it is under an environment, such as wet chlorine, various kinds of oxidize chloride, and even inside the chloride solution, sulphuric acid and oxide salt solution, low or middle temperature hydrochloric acid solution. Specially under the hydrofluoric acid condition, its performance even is better than the ceramics material. Alloy C-276 has an outstanding performance for point corrosion, aperture corrosion and stress corrosion specially. Duo to under an oxidize and reducing state case, it has an excellent resistant ability to most corrosion mediums, alloy C-276 is now widely applied to all kinds of trenchant corrosion surroundings in recentthirty years, it nowbecomes one kind of typical corrosion -resistant Ni-base alloy.

Steel Name Antitheses for Parts of Twin & Single Screw Extruder

Chinese name

Japonic name

Germanic name

Columbian name

Purpose

Characteristic

4Cr5MoSiV1(Nitriding Steel)

SKD61

X40CrMoV51 (No.1.2344)

T20813 (AISI: H13)

Screw Element

&

Kneading Disk

&

Single Screw

★(HV≧840)

38CrMoAl(Nitrding steel)

SACM645

41CrAlMo7

( SAE ) 6470E

★+ (HV≧950)

Cr12MoV(Vacuum hardened)

SKD11

X165CrMoV12 (No.1.2601)

T30402 ( AISI: D2 )

★★(HRC≧58)

Cr12Mo1V(Vacuum hardened)

SKD11

X155CrVMo12 (No.1.2379)

T30402 ( AISI: D2 )

★★(HRC≧59)

W18Cr4V(Vacuum hardened)

SKH2(SKH9)

S18-0-1 (No.1.3355)

T12001 ( AISI: T1 )

★★+(HRC≧63)

W6Mo5Cr4V2(Vacuum hardened)

SKH51

S6-5-2 (No.1.3343)

T11302 (AISI: M2 )

★★★★(HRC≧63)

W6Mo5Cr4V3(Vacuum hardened)

SKH52

S6-5-3 (No.1.3344)

T11313 (AISI: M3-1 )

★★★★(HRC≧64)

W2Mo9Cr4V2(Vacuum hardened)

SKH58

S2-9-2 (No.1.3348)

T11307 (AISI: M3 )

★★★★★(HRC≧65)

00Cr17Ni14Mo2

SUS316L

X2CrNiMo18.10(No.1.4404)

S31603 (AISI: 316L)

For corrosion resistant

0Cr17Ni4Cu4Nb

SUS630

X5CrCuNb17.4

17-4PH

★★★(HRC≧42)

40Cr

SCr440

41Cr4 (No.1.7035)

G51400 (AISI: 5140)

Screw Shaft

&

Base material

of barrel

★-

42CrMo

SCM440

42CrMo4 (No.1.7223)

G41400 (AISI: 4140)

★Hardness after thermal refining: HB269

40CrNiMoA

SNCM439

36NiCrMo4 (No.1.6511)

G43400 (AISI: 4340)

★★Hardness after thermal refining: HB217

45CrNiMoVA

SNCM447

No the same

No the same

★★★

45

S45C

CK45 (No.1.1191)

G10450 (AISI: 1045)

Base material of Extruder Barrel

Bimetallic“C”form:Omega101

Fe-base material with wear resistance feature, the same as Xaloy 102

Liner inside

Segment Barrel

★★

PM-HIP Technology:Omega101A

Fe-base material with high wear resistance feature which meets needs of W&P company in Germany

★★★

PM-HIP Technology:Omega201A

Co-base material with corrosion resistant feature

★★

PM-HIP Technology:Omega301A

Co-base material with both wear and corrosion resistant feature

★★★

PM-HIP Technology:

SiC Composite Ceramics

With much higher wear and corrosion resistant features

★★★★

Additional Nanometer Ceramics Compound Coating could be chosen on surface of parts above to get much more wear and corrosion resistant ability.

Information of Nanometer Ceramics Compound Coating for

Single Screw and Screw Element & Kneading Disk

Nanometer Ceramics Compound Coating is one kind of new and high-tech surface treatment technique for metal material, which will be used for many fields. The machinery parts perform a super-hard micro hardness, high wear-resistant and corrosive-resistant features by adding Nanometer Ceramics Coating on the surface. We try to applying this coating technology to single screws, to screw elements and barrel liners which are installed in Twin Screw Extruder. As a result we enjoy superior feedback, they praise that “we found a feeling that machines step over with big strides”.

Our engineers and some experts from this field together design this nanometer ceramics com pound coating, which is made from special material and HIP technical method. It retains the wear-resistance, corrosion-resistance and oxidation-resistance features from ordinary ceramics amorphous state structure; This coating is also multi-compounded by ceramics and transition metal, so the bonding force between coating and base material and toughness of coating are immensely improved, the internal stress of coating brings down sharply, consequently the inherent brittleness of ceramics is controlled to some extent, this strongly improves its fatigue resistance, extend the useful time of the machinery parts. Compare with normal cermet coating, nanometer coating is more symmetrical, and has a stronger bond of its film-base.

At the time one single screw and screw elements is quick-rotating in the various of inner sleeves inside segment barrels, there will be shearing abrasion between these parts and materials. Besides, contact wear also exists between the surface of a screw & screw elements and inner wall of liners. As the lower friction coefficient of nanometer ceramics compound coating, that’s to say better self-lubricating feature can obviously improve this contact wear, make the abrasion loss of screw & screw elements reduced sharply. After experiment, we find the wear-resistant feature of this nanometer ceramics compound coating is 6 times of ordinary chrome plating, is 4 times of ordinary titanium plating! Its corrosive-resistant feature is also significantly higher than hard-chrome plating or titanium plating generated by charged ions exchange.

The screws we manufacture in nitriding way(base material 38CrMoAl), and the screw elements made of High Speed Steel(HSS) and after vacuum hardening, are coated with 0.020mm nanometer ceramics compound layer, to be delivered to our clients. Shortly later, the client’s response come: The service life of these screws and screw elements with nanometer ceramics compound layer is at least one more time than those without this coating.

Regarding the exact and efficient data about wear-resistant and corrosion resistant features of these parts which coated with nanometer ceramics compound layer, we are following and would report later.

2. Level of Wear Resistance & Corrosion Resistance（See right） This level sheet shows the direct visual comparisons of wear resistance & corrosion resistance level for screw element & kneading disk,, specially the material for ZSK machines by Krupp Werner & Pfleiderer of Germany, the material which advised by Metso Material Technology of Finland, and the common materials, such as D2, M2.. In the sheet, you can find the wear resistance of WR5 is much better than normal material M2 and D2. We have to thank to all the end useŕs support in our after-sale service process. All the data verified that the contrast of two features is relatively accurate, here shares for reference.We heartfelt wish to get more data to complete and verify the contrast above continuously.

Ralloy® WR13 is an extra high chromium alloyed P/M-tool steel. Due to high volume of fine uniformly distributed hard carbides it has an excellent wear resistance with good toughness.The very high chromium content ensures good corrosion resistance in operation environment.

1. Nominal composition

C

Si

Mn

Ni

Cr

V

Mo

Ta/Nb

W-%

2,6

0,6

<0,5

0,4

26,0

2,7

1,1

1,5

2. Condition as supplied

Annealed

Hardness 320HB

Hardened and tempered

Hardness 52-63HRC

3. Mechanical Properties

Compressive strength

Heat Treatment

Hardness

HRC

Compressive Strenght MPA

Aust.1100℃,oil quench

Temper 500℃

63

3500

Aust.1150℃,oil quench

Temper 500℃

62

3950

Aust.1150℃,oil quench

Temper 550℃

58

3550

Heat treatment

Average impact vales

Joules

Austenizing1150℃, Tempering500℃

10J

4.Wear and corrosion resistance

Due to high volume of hard chromium, vanadium and niobium carbides and the uniform fine microstructure the abrasion resistance of WR13 is superior to conventional stainless wear resistant steels and most PM-tool steels.The high chromium level in the matrix results in excellent corrosion resistance.